Soakaways

Soakaways

Planning policies require developers to minimise the impact new construction has on increasing the likelihood of surface water flooding, in particular by using Sustainable Urban Drainage Systems (‘SUDs’) wherever posible. In order to reduce this impact, designers need to reduce rapid runoff into the local water course and where possible avoid the direct channelling of surface water through the existing network of pipes and sewers.

Soakaways have been a traditional way of disposing of surface water from buildings and paved areas that are remote from a public sewers or water course. Soakaways are now also being widely adopted within urban, fully sewered areas to limit the impact on the increased discharge from new developments and to avoid the cost of upgrading existing sewers outside the developments boundary.

Typically, water companies will only allow connection to the existing drainage system if the designers can demonstrate that soakaways are not a viable drainage solution.

Nicholls Colton Group are able to offer a number of different site investigation techniques for determining the permeability of the soils present on your site and to assist the design of SuDs or micro drainage systems. Nicholls Colton will select the most appropriate ground investigation plant and equipment for the individual site and this may include machine excavated trial pit soakaway tests in accordance with the  BRE 365 Digest, permeability tests within boreholes or simple shallow soakaway tests within hand augered holes or hand excavated trial pits.